What is the value of i20+1
1 answer:
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Answer:
1.63% probability that the 10 selected include include all the best 5 engineers in the group of 20
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
The order in which the engineers are selected is not important, so the combinations formula is used to solve this question.
Combinations formula:
is the number of different combinations of x objects from a set of n elements, given by the following formula.
Desired outcomes:
10 engineers selected from a set of 20.
5 best, from a set of 5.
Other 5, from a set of 20-5 = 15.
Totao outcomes:
10 engineers selected from a set of 20.
Probability:
1.63% probability that the 10 selected include include all the best 5 engineers in the group of 20
Answer:
No.
Step-by-step explanation:
It is given that Darius is putting tiles on the roof of his house.
Darius had completed = th of the work
He takes time = hours to complete
th of the work
The remaining work =
∴ Darius completes th of the work in =
hours
So, th of the work in =
hours
hours
Therefore total time taken to complete the work hours
hours
hours
hours
hours
Thus, Darius continues to work at the same rate will not be able to complete the work in 4 hours.